Hogan's scheme to help a German baroness escape to London is thwarted by the arrival of a new prisoner of war--- Colonel Crittendon--- whose repeated bungled attempts at escape are wreaking havoc on Hogan's mission to spirit away the baroness.

An important German nuclear scientist must be eliminated and Hogan's crew is asked to perform the task --- a plan that takes an unexpected twist when the scientist comes to Hogan and asks for help in fleeing the Nazi regime.

Colonel Hogan is called on to destroy a German convoy inside a tunnel --- but he balks when he discovers that his accomplice will be his old adversary, Colonel Crittendon.

Colonel Hogan receives a stunning message: he's to return home to the U.S.A. for a hero's welcome. The men of Stalag 13, convinced the Hogan will remain at the camp to continue his operation, are further stunned when he is overjoyed at the news --- and plans to bid Stalag 13 a fond farewell!

The clumsy and annoying Colonel Crittendon inadvertently messes up Hogan's plans to destroy a German ball-bearing plant.

On a mission to capture Rommel, Colonel Crittendon and his commandos parachute into camp, but the Colonel is the only one to avoid capture.

Part 1 of 2. When Sir Charles Chitterly parachutes into Stalag 13, Hogan asks Colonel Crittendon to pretend he's Sir Charles --- but Lady Chitterly isn't fooled.

Part 2 of 2. Hogan fears the phony Sir Charles can't trick Hitler. Things get even more complicated when Chitterly escapes from the prisoner's tunnel.